Loading [MathJax]/jax/output/CommonHTML/jax.js
CMS logoCMS event Hgg
Compact Muon Solenoid
LHC, CERN

CMS-HIN-10-001 ; CERN-PH-EP-2011-092
Dependence on pseudorapidity and on centrality of charged hadron production in PbPb collisions at √sNN = 2.76 TeV
CMS Collaboration
24 July 2011
J. High Energy Phys. 08 (2011) 141
Abstract: A measurement is presented of the charged hadron multiplicity in hadronic PbPb collisions, as a function of pseudorapidity and centrality, at a collision energy of 2.76 TeV per nucleon pair. The data sample is collected using the CMS detector and a minimum-bias trigger, with the CMS solenoid off. The number of charged hadrons is measured both by counting the number of reconstructed particle hits and by forming hit doublets of pairs of layers in the pixel detector. The two methods give consistent results. The charged hadron multiplicity density dN(ch)/dη, evaluated at η= 0 for head-on collisions, is found to be 1612 ± 55, where the uncertainty is dominated by systematic effects. Comparisons of these results to previous measurements and to various models are also presented.
Links: e-print arXiv:1107.4800 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; HepData record ; CADI line (restricted) ;
Figures CMS Publications
Figures

png pdf 		Figure 1:

png pdf 		Figure 2-a:

png pdf 		Figure 2-b:

png pdf 		Figure 3-a:

png pdf 		Figure 3-b:

png pdf 		Figure 4-a:

png pdf 		Figure 4-b:

png pdf 		Figure 5-a:

png pdf 		Figure 5-b:

png pdf 		Figure 6:
Compact Muon Solenoid
LHC, CERN